mainlining shenanigans
af722d280e
Eliminate the loops from the gen2-3 irq handlers. Since we don't use MSI anymore on these platforms, and thus the CPU interrupt will be level triggered, we shouldn't need to play any tricks with IER to induce edges from IIR. IIR itself still detects only edges from PIPESTAT & co. on gen4 but since IIR is double buffered and we only clear one bit per irq handler invocation we can use the normal "clear PIPESTAT & co. -> clear IIR" approach to ack the interrupts. On gen2 everything is level triggered, and gen3 presumably follows either the gen2 or gen4 approach since nothing else would really make sense. v2: Drop the IER tricks since we no longer use MSI Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170818183705.27850-12-ville.syrjala@linux.intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> |
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| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
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| ipc | ||
| kernel | ||
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.